njrat | 3d12a39e3a94131fc5cb7d5ad0a3ae94c94ed9f528a68bcdbc50f1316860e157

General

Target

3D12A39E3A94131FC5CB7D5AD0A3AE94C94ED9F528A68.exe
Size

23KB
MD5

540c26994ac206f56ced1ab9097edd71
SHA1

ac5b7b5d505d5ec226ee2ecad0e0aa256c080a26
SHA256

3d12a39e3a94131fc5cb7d5ad0a3ae94c94ed9f528a68bcdbc50f1316860e157
SHA512

8b0f653c5b547409f587b0440fd7d070f1b247be8562fdf9712479cf69c0d720cc19fc7a8850499de89c2588023e849c5647b4b27f54543c7d5e1c49388782cd
SSDEEP

384:6QeCo2zmZbQHkJeCdUwBvQ61gjuQBnB9mRvR6JZlbw8hqIusZzZkD:l5yBVd7Rpcnud

Score

10^/10

njrat hacked evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

cisco5319.ddns.net:1177

Mutex

22d454c9d4a86e192f7a5423970a5c83

Attributes

reg_key
22d454c9d4a86e192f7a5423970a5c83
splitter
|'|'|

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3620 netsh.exe

pid	process
3620	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

3D12A39E3A94131FC5CB7D5AD0A3AE94C94ED9F528A68.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	3D12A39E3A94131FC5CB7D5AD0A3AE94C94ED9F528A68.exe

Drops startup file 2 IoCs

Processes:

csrss.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\22d454c9d4a86e192f7a5423970a5c83.exe	csrss.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\22d454c9d4a86e192f7a5423970a5c83.exe	csrss.exe

Executes dropped EXE 1 IoCs

Processes:

csrss.exe

pid process

2648 csrss.exe

pid	process
2648	csrss.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

csrss.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\22d454c9d4a86e192f7a5423970a5c83 = "\"C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe\" .."	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\22d454c9d4a86e192f7a5423970a5c83 = "\"C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe\" .."	csrss.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 17 IoCs

Processes:

csrss.exe

description	pid	process
Token: SeDebugPrivilege	2648	csrss.exe
Token: 33	2648	csrss.exe
Token: SeIncBasePriorityPrivilege	2648	csrss.exe
Token: 33	2648	csrss.exe
Token: SeIncBasePriorityPrivilege	2648	csrss.exe
Token: 33	2648	csrss.exe
Token: SeIncBasePriorityPrivilege	2648	csrss.exe
Token: 33	2648	csrss.exe
Token: SeIncBasePriorityPrivilege	2648	csrss.exe
Token: 33	2648	csrss.exe
Token: SeIncBasePriorityPrivilege	2648	csrss.exe
Token: 33	2648	csrss.exe
Token: SeIncBasePriorityPrivilege	2648	csrss.exe
Token: 33	2648	csrss.exe
Token: SeIncBasePriorityPrivilege	2648	csrss.exe
Token: 33	2648	csrss.exe
Token: SeIncBasePriorityPrivilege	2648	csrss.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

3D12A39E3A94131FC5CB7D5AD0A3AE94C94ED9F528A68.execsrss.exe

description	pid	process	target process
PID 3992 wrote to memory of 2648	3992	3D12A39E3A94131FC5CB7D5AD0A3AE94C94ED9F528A68.exe	csrss.exe
PID 3992 wrote to memory of 2648	3992	3D12A39E3A94131FC5CB7D5AD0A3AE94C94ED9F528A68.exe	csrss.exe
PID 3992 wrote to memory of 2648	3992	3D12A39E3A94131FC5CB7D5AD0A3AE94C94ED9F528A68.exe	csrss.exe
PID 2648 wrote to memory of 3620	2648	csrss.exe	netsh.exe
PID 2648 wrote to memory of 3620	2648	csrss.exe	netsh.exe
PID 2648 wrote to memory of 3620	2648	csrss.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\3D12A39E3A94131FC5CB7D5AD0A3AE94C94ED9F528A68.exe
"C:\Users\Admin\AppData\Local\Temp\3D12A39E3A94131FC5CB7D5AD0A3AE94C94ED9F528A68.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3992

C:\Users\Admin\AppData\Roaming\csrss.exe
"C:\Users\Admin\AppData\Roaming\csrss.exe"
2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2648

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\csrss.exe" "csrss.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:3620

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\csrss.exe
Filesize
23KB

MD5
540c26994ac206f56ced1ab9097edd71

SHA1
ac5b7b5d505d5ec226ee2ecad0e0aa256c080a26

SHA256
3d12a39e3a94131fc5cb7d5ad0a3ae94c94ed9f528a68bcdbc50f1316860e157

SHA512
8b0f653c5b547409f587b0440fd7d070f1b247be8562fdf9712479cf69c0d720cc19fc7a8850499de89c2588023e849c5647b4b27f54543c7d5e1c49388782cd

Download Submit
C:\Users\Admin\AppData\Roaming\csrss.exe
Filesize
23KB

MD5
540c26994ac206f56ced1ab9097edd71

SHA1
ac5b7b5d505d5ec226ee2ecad0e0aa256c080a26

SHA256
3d12a39e3a94131fc5cb7d5ad0a3ae94c94ed9f528a68bcdbc50f1316860e157

SHA512
8b0f653c5b547409f587b0440fd7d070f1b247be8562fdf9712479cf69c0d720cc19fc7a8850499de89c2588023e849c5647b4b27f54543c7d5e1c49388782cd

Download Submit
C:\Users\Admin\AppData\Roaming\csrss.exe
Filesize
23KB

MD5
540c26994ac206f56ced1ab9097edd71

SHA1
ac5b7b5d505d5ec226ee2ecad0e0aa256c080a26

SHA256
3d12a39e3a94131fc5cb7d5ad0a3ae94c94ed9f528a68bcdbc50f1316860e157

SHA512
8b0f653c5b547409f587b0440fd7d070f1b247be8562fdf9712479cf69c0d720cc19fc7a8850499de89c2588023e849c5647b4b27f54543c7d5e1c49388782cd

Download Submit
memory/3992-133-0x0000000000CA0000-0x0000000000CB0000-memory.dmp

Filesize
64KB

Download
memory/3992-134-0x0000000000CA0000-0x0000000000CB0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads